#define uint32_t unsigned int
#define uint16_t unsigned short
#define uint8_t unsigned char
#define ELF_MAGIC 0x464C457FU

struct Elf {
	uint32_t e_magic;
	uint8_t e_elf[12];
	uint16_t e_type;
	uint16_t e_machine;
	uint32_t e_version;
	uint32_t e_entry;
	uint32_t e_phoff;
	uint32_t e_shoff;
	uint32_t e_flags;
	uint16_t e_ehsize;
	uint16_t e_phentsize;
	uint16_t e_phnum;
	uint16_t e_shentsize;
	uint16_t e_shnum;
	uint16_t e_shstrndx;
};
//e_type
#define ET_EXEC		2

struct Proghdr {
	uint32_t p_type;
	uint32_t p_offset;
	uint32_t p_va;
	uint32_t p_pa;
	uint32_t p_filesz;
	uint32_t p_memsz;
	uint32_t p_flags;
	uint32_t p_align;
};
//p_type
#define PT_LOAD		1
#define PT_GNU_STACK	0x6474e551
//p_flags
#define PF_X		(1 << 0)
#define PF_W		(1 << 1)
#define PF_R		(1 << 2)

struct Secthdr {
	uint32_t sh_name;
	uint32_t sh_type;
	uint32_t sh_flags;
	uint32_t sh_addr;
	uint32_t sh_offset;
	uint32_t sh_size;
	uint32_t sh_link;
	uint32_t sh_info;
	uint32_t sh_addralign;
	uint32_t sh_entsize;
};
//sh_type
#define SHT_SYMTAB	2
#define SHT_STRTAB	3
#define SHT_NOBITS	8
#define SHT_REL		9
//sh_flags
#define SHF_W		(1 << 0)
#define SHF_A		(1 << 1)
#define SHF_E		(1 << 2)

struct Symtab
{
	uint32_t st_name;
	uint32_t st_value;
	uint32_t st_size;
	uint8_t st_info;
	uint8_t st_other;
	uint16_t st_shndx;
};
//st_shndx
#define SHN_UNDEF	0
#define SHN_ABS		0xfff1
#define SHN_COMMON	0xfff2

struct Rel
{
	uint32_t r_offset;
	uint32_t r_info;
};
//r_info_least_8_bits
#define R_386_32	1
#define R_386_PC32	2
